How to add Area lights to gltf?
As of April 2021, area lights are only a proposal for the glTF format. Unless and until they become part of the format, you'd need to recreate the lights in three.js.
One workaround would be to put metadata about the lights onto empties in Blender, as Custom Properties. The custom properties can be exported with glTF &quot;extras&quot;, and become available to three.js as object.userData, which you can use to construct new objects at runtime.